I saw him puzzle over an arithmetic problem.

我看见他正在苦心思索一道算术题.

辞典例句

Cang Li Man, I puzzle over what you look like today.

陶子:“仓里满, 我对于你今天的样子感到困惑. ”

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Tao Zi, I puzzle over the meaning of life.

仓里满:“陶子, 我对于生命的意义感到困惑. ”

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She lets him puzzle over that for a moment, then claps her hands.

听了这话他糊涂了,稍过片刻之后,她拍了拍手.

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